/* Cloudflare Official Design System */
:root {
    /* Cloudflare Brand Colors */
    --cf-orange: #F6821F;
    --cf-orange-dark: #E56A0F;
    --cf-orange-light: #FFF4ED;
    
    /* Cloudflare Grays */
    --cf-gray-dark: #404041;
    --cf-gray-medium: #6B6B6B;
    --cf-gray-light: #999999;
    --cf-gray-lighter: #D9D9D9;
    --cf-gray-lightest: #F3F3F3;
    
    /* Cloudflare UI Colors */
    --cf-blue: #0051C3;
    --cf-blue-dark: #003681;
    --cf-blue-light: #E6F0FF;
    
    /* Status Colors */
    --cf-success: #2E7D32;
    --cf-warning: #F57C00;
    --cf-error: #C62828;
    --cf-info: #1976D2;
    
    /* Background Colors */
    --cf-bg-primary: #FFFFFF;
    --cf-bg-secondary: #F9F9F9;
    --cf-bg-tertiary: #F3F3F3;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--cf-bg-secondary);
    color: var(--cf-gray-dark);
    line-height: 1.6;
    font-size: 16px;
}

/* Header / Navigation */
.navbar {
    background: white;
    border-bottom: 1px solid var(--cf-gray-200);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--cf-gray-900);
    text-decoration: none;
}

.navbar-logo {
    width: 32px;
    height: 32px;
    background: var(--cf-orange);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.5px;
}

.navbar-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
    list-style: none;
}

.navbar-menu a {
    color: var(--cf-gray-600);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.navbar-menu a:hover {
    color: var(--cf-blue);
}

.navbar-menu a.active {
    color: var(--cf-blue);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.container-narrow {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
}

/* Cards */
.card {
    background: white;
    border-radius: 8px;
    border: 1px solid var(--cf-gray-200);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--cf-gray-200);
    background: var(--cf-gray-50);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--cf-gray-900);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--cf-gray-200);
    background: var(--cf-gray-50);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--cf-gray-700);
    font-size: 0.875rem;
}

.form-label-required::after {
    content: " *";
    color: var(--cf-error);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--cf-gray-300);
    border-radius: 6px;
    font-size: 0.875rem;
    transition: all 0.2s;
    background: white;
    color: var(--cf-gray-900);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--cf-blue);
    box-shadow: 0 0 0 3px var(--cf-light-blue);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-help {
    font-size: 0.75rem;
    color: var(--cf-gray-500);
    margin-top: 0.25rem;
}

.form-error {
    font-size: 0.75rem;
    color: var(--cf-error);
    margin-top: 0.25rem;
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-checkbox input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    cursor: pointer;
}

/* Buttons */
.btn {
    padding: 0.625rem 1.25rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    justify-content: center;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--cf-blue);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: var(--cf-dark-blue);
}

.btn-secondary {
    background: var(--cf-gray-200);
    color: var(--cf-gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--cf-gray-300);
}

.btn-success {
    background: var(--cf-success);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background: #15803d;
}

.btn-danger {
    background: var(--cf-error);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #b91c1c;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--cf-gray-300);
    color: var(--cf-gray-700);
}

.btn-outline:hover:not(:disabled) {
    background: var(--cf-gray-100);
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-pending {
    background: var(--cf-warning);
    color: white;
}

.badge-approved,
.badge-auto_approved {
    background: var(--cf-success);
    color: white;
}

.badge-rejected {
    background: var(--cf-error);
    color: white;
}

.badge-under_review {
    background: var(--cf-info);
    color: white;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    display: flex;
    gap: 0.75rem;
    align-items: start;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #86efac;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #93c5fd;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde047;
}

/* Table */
.table-container {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table thead {
    background: var(--cf-gray-50);
    border-bottom: 2px solid var(--cf-gray-200);
}

.table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--cf-gray-600);
    letter-spacing: 0.05em;
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--cf-gray-200);
    font-size: 0.875rem;
}

.table tbody tr:hover {
    background: var(--cf-gray-50);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--cf-gray-200);
    box-shadow: var(--shadow-sm);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--cf-gray-600);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--cf-gray-900);
}

.stat-change {
    font-size: 0.75rem;
    margin-top: 0.5rem;
}

.stat-change.positive {
    color: var(--cf-success);
}

.stat-change.negative {
    color: var(--cf-error);
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--cf-gray-200);
    border-top-color: var(--cf-blue);
    border-radius: 50%;
    width: 2rem;
    height: 2rem;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
}

.empty-state-icon {
    font-size: 3rem;
    color: var(--cf-gray-400);
    margin-bottom: 1rem;
}

.empty-state-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--cf-gray-900);
    margin-bottom: 0.5rem;
}

.empty-state-description {
    color: var(--cf-gray-600);
    margin-bottom: 1.5rem;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.hidden { display: none; }

/* Responsive */
@media (max-width: 768px) {
    .navbar-container {
        padding: 1rem;
    }
    
    .container {
        padding: 1rem;
    }
    
    .navbar-menu {
        gap: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}